The Iditarod is an annual long-distance sled dog race held in Alaska, covering approximately 1,000 miles from Anchorage to Nome. It typically takes place in early March and showcases the endurance of both the mushers and their dog teams. The race commemorates the historic 1925 serum run to Nome, which delivered diphtheria antitoxin to combat an outbreak. Mushers, the individuals who drive the sleds, face challenging weather conditions, including extreme cold and blizzards. The race is divided into several checkpoints where teams can rest and resupply. The Iditarod is considered one of the toughest races in the world, attracting participants from various countries.